- harðbrjóstr, adv. d. s. Heilag. II, 4096.
Part of speech: adv
Possible runic inscription in Medieval Futhork:ᚼᛆᚱᚦᛒᚱᛁᚮᛋᛏᚱ
Medieval Runes were used in Norway from 11th to 15th centuries.
Futhork was a continuation of earlier Younger Futhark runes, which were used to write Old Norse.